Improvement in tables for drilling-machines



4THOMAS nnANnY, or c-Hn's'rnn, PENNSYLVANIA..

Letters Patent No. 111,084, dated January 17,1871.

lMPRQVEMENT IN TABLES FOR DRILLING-MACHINES.

The Schedule referred to in these Letters'Patent'and making `part: o the same.

I, THOMAS REANEY, of Chester, county of Delaware, State of Pennsylvania, have inyented'an Improved Table for Drilling and other Machines, of which the -following is a specification.

Nature and' Object of the Ineention.

My invention consists-of a table, in which are compartments containing a number of balls for support-ing plates to be operated on by the tool of a drilling or `conntersinlring-machine, the said balls permitting the platesto be vreadily and easily adjusted.

Description of the Accompanying Drawing.

' ITigure 1 isa perspective view of my improved table for drilling and other machines; and

Figure 2, a `"ertieal section of part of the table,

drawn to` an enlarged scale. L

General Description,

1n drilling or countersinking holes in large and heavy plates, such, for instance, :is-those vused in onstructing the shell of an iron vessel, considerable difficulty has been experienced in -moving the plate and adjusting it to a proper position so that the revolvingr tool will act at the desired point. Y

This isowing'to the large area of the plate, which usually rests on a'plain table, causing a friction which interferes with nice and ready adjustment. The tables have sometimes been furnished with rollers, which render the movement of the plate somewhat easier, but not in all directions, and consequently do not afford facilities for the nico adjustment required'. ln order to overcome thisA dieulty, I form on the table A, by means of suitable ribs a, a number of eom lpartments, B, into each of which I place a number of metal halls,-the latter supportingthe pla-te above the,

edges of the ribs 'so that itcan be moved to andi fro withthe greatest facility in every direction, while the balls are retained wit-hin Abounds and are prevented at one point, by the ribs. v

from rolling fromthe. table, or from crowding together In gr2, D represents a plate resting on tlie balls :v and E represents a portion of a eount-ersinking tool, earried by the revolving spindle' of an ordinary drillingmachine, in which the spindle can be depressed by any of the usual appliances.

Immediately below this tool Ifl, and secured-:to the table, is a plate, G, having an annular channel arranged eoncentrieally with thesaid tool, and adapted to a series of balls, a;, which are a trie higher than the balls in the compartments B of the table, so that the plate is certa-in to bear on the balls in the channel, while those at a distauee'support the remaining portions of the plate. j By this arrangement Qi v the balls'in an annular channel near the countersinking tool, not only' is the steadiness of the plate at the proper poiutinsurcd, but the adjustment ot the-plate rendered more easy.

The table with its balls may be used as a valuable adj unetl to drilling, punching, shearing, and other ma- `chines in which the ready adjustment of the plate to be operated on is a desirability.

The table may be made of wood and faced with 2. In con'lhnationwiththe subject-matter ofthe' Y' Y foregoing claim, the annular channeled plate C, and

the balls lying loosely therein, as set forth.

In testimony whereof I have signed my name to thisspecication in the presence of two subscribing witnesses.

THOS. ItllAllEY.

Witnesses:

W. B. REANEY, Vl. G. BAM,J1. 

